Move agent activity below composer (#579)

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Wes <wesb@block.xyz>

desktop/src/shared/api/relayClientSession.ts

@@ -277,12 +277,12 @@ export class RelayClient {
         kinds: [KIND_TYPING_INDICATOR],
         "#h": [channelId],
         limit: 10,
+        since: Math.floor(Date.now() / 1_000) - 10,
       },
       onEvent,
     );
   }
 
-  /** Subscribe to kind:20001 presence events (live only, no backfill). */
   async subscribeToPresenceUpdates(onEvent: (event: RelayEvent) => void) {
     return this.subscribe({ kinds: [20001], limit: 0 }, onEvent);
   }